Eleanor Jean Parker (June 26, 1922 – December 9, 2013) was an American actress who appeared in some 80 movies and television series. An actress of notable versatility, she was called Woman of a Thousand Faces by Doug McClelland, author of a biography of Parker by the same title.

At age 18, Parker was signed by Warner Brothers in 1941. She was nominated three times for the Academy Award for Best Actress in the 1950s, for Caged (1950), Detective Story (1951) and Interrupted Melody (1955). Her role in Caged also won her the Volpi Cup for Best Actress at the Venice Film Festival. One of her most memorable roles was that of "the Baroness" in The Sound of Music (1965).